I don't know anything about mountain bikes....but I have to laugh when a seller says "Shimano components"! Duhhhh...which ones?! Shimano makes everything from $20 components that go on Walmart bikes....to Di2, which costs a few grand..... (One thing i do know about MTBs: Make sure the shocks are in good condition...'cause they cost more than the bike is worth to replace!). And try and make sure the bike isn't stolen.....I get leary when a seller doesn't know anything about the bike he's selling.....)